When the Mac boots back up and wi-fi is enabled again, for many users their wireless internet connection will immediately work again as expected.

When the Mac has booted back up as usual, go back to the Wi-Fi menu and choose “Turn Wi-Fi On” and join your typical wireless network.

After those matching wi-fi configuration files are out of the SystemConfiguration folder, reboot the Mac by going to the  Apple menu and choosing “Restart”.

Remove those matching files, you can either place them into a folder on the desktop as a rudimentary backup, place them into the Trash without emptying, or actually delete them.

Locate and select the following files in the SystemConfiguration folderĬom.plist.

Library/Preferences/SystemConfiguration/

Enter the following path exactly into “Go to folder” window and choose “Go”.

Open Finder in macOS and pull down the “Go” menu and choose “Go To Folder” (or hit Command+Shift+G to get there quickly).

Turn OFF wi-fi by selecting the wi-fi menu bar item and choosing “Turn Wi-Fi Off”.

Quit any active applications that are using wi-fi or the internet (Safari, Chrome, etc).

Do not remove any other system configuration files. This is going to involve removing some system configuration files, therefore you should backup your Mac first, just in case. 1: Remove Existing Wi-Fi Preferences in macOS Sierra Time Machine makes it easy, but you can use whatever backup method you’d like. It is recommended to backup your Mac before beginning any of this process. We’ll also cover some additional generic wi-fi troubleshooting tips that may be helpful if the primary two approaches do not resolve the difficulty. The approach may fix other networking related issues as well, but those are the primary wifi problems aimed to be addressed by this walkthrough.

Wi-Fi connections are unusually slow or have a higher ping than usual after updating to macOS Sierra.

macOS Sierra drops wi-fi connections or disconnects from wireless at random.

The Mac disconnects from wi-fi when wakes from sleep.

These steps should resolve the most typical manifestations of wi-fi networking problems seen with macOS Sierra, which are the following: What we’re going to cover here involves a longstanding approach to resolve most common wi-fi issues with Mac OS, composing primarily of removing existing wi-fi settings and then recreating a new network profile with some custom settings. We’ll walk through some some-tested troubleshooting steps to resolve wireless networking troubles with a Mac running macOS Sierra.

Backup my mac on my wifi network